Airtel — Charging without active plan

My landline number is [protected] which also has an active internet connection.

This was a prepaid plan which i took by paying the advance rental of 6 months and it expired on 13th march 2020.

As it was a prepaid plan the services should have ended on 13th march 2020. But it did not and airtel fraudulently kept it active.

Airtel is still charging me even when there is a national lockdown in the country and therwcis no way one can have access to the services.

My concern is that when there was was no verbal consent of mine for the account to be active then why did airtel without my consent kept the account active and still charging me.

Almost all day i keep reciving the calls from airtel from many diffrent numbers and it is really a harassment.

I request the concerned authorities to take strict action against airtel.

How can a prepaid account be active after the tenure has been completed and automatically be converted into a postpaid account without any kind of consent from the customer.